I think the reason no one has responded is because we don't know of a way to do this -- at least not anything that doesn't involve custom code....
I suppose you could submit your xml from you form to a SharePoint library that only you have permissions to write to, and the rest of the group has read permissions, and then have a link somewhere to the xml....Do you have IPFS set up? You could browser enable the form... of course, that would require InfoPath 2007, instead of 2003.